Hmm a few
I have to sleep with my feet covered. The sheet has to be wrapped around them, it's so scorpions don't crawl into the bed...
If I scuff my right shoe, I have to scuff the left one as hard so they wear out evenly.
Volume has to be in even numbers but not 6 because that's evil. I make a conscious effort to avoid the number 6, doesn't matter where it crops up.
If I walk past someone smoking I won't breathe until I am out of the smoke zone. This can cause trouble when they're walking the same way and I end up going blue or having to escape.
Plastic pegs have to go with plastic pegs, wooden with wooden.

{climbing specific}
Racking my climbing gear, certain nuts go with certain crabs.
They all have to face the same way.
Even though I check on the ground, I have to re-check everything at 15feet or so up. Knots, harness, the works.
Can't have odd numbers of anything, has to be even, so I take 4 or 8 cams on a route typically (avoiding that evil 6)
After every route I HAVE to coil the rope. It's then uncoiled for the next one.
{end of climbing specific}
( zulu eh?, Fri 2 Jul 2010, 9:24, 2 replies)

Climbers and cavers
The most bizarre of all outdoory people. I once stayed in a cavers' hut somewhere in the Peak District with some friends. We were there to get pissed but the cavers were there to do some serious caving. Most of them never spoke, other than to occasionally scream: "Who moved my gear? It was on the floor - I'll probably die tomorrow thanks to whoever did that."
(Smale is stuffed, Fri 2 Jul 2010, 10:24, closed)

Makes complete sense with the rack.
I don't have to look to find the right nut/cam/cowbell.
Having 'biners the right way round often helps tremendously when pumped out two finger crimp needs a placement.

You only need things to go wrong once... I should know!
( Blind Meach Cautiously optimistic, Fri 2 Jul 2010, 10:54, closed)